Locomotive-tire-boring mill



4 Sheets-Sheet l L, C. COLE LOCOMOTTVE TIRE BORING MILL Filed Dec. 22, 1924 @ma `29, 19217A L. C. COLE LOCOMOTIVE TIRE BORING MILL New 29, 1927.

Filed Dec. 22, 1924 New 29, 1927.-

L. C. COLE LOCOMOTIVE TIRE BORING MILL Filed Dec. 22, 1924 4 Sheets-Sheet 3 og gde.

A TTBNEY 'ijllllllllllllll INVENTH Bx i I A TTRNEY Vnrnnoiv o. connor HAMILTON, onto, Assrenon To ninns-nnivinnr-Ponn COMPANY;

OF NEW YORK, N. Y., A. CORPORATION 0F NEW JERSEY;

Loooi/iorvnrrnn-Bonrlm Miri..

Application led December 22, 1924. p Serial No. 757,465. i

This invention relates to machine tools and particularly to a machine tool of large size adapted for performing heavy cutting operations upon forgings suohas locomotive wheel tires. Y i

An object of the present invention is to provide a metal cutting machinesuchas a locomotive tire turning machine with improved work supporting and clamping mechanism so that it may be quickly posi,-

tioned on the rotatable work table and rigidly clamped thereto quickly andk with a minimum of labor. i

Another object of the invention toprovide a work clampingl mechanism for a machine of the above type vwhich may be moved by mechanical means into and `out of operative position and then forced into final and clamping position by fluid pressure means. n

Another object of the invention is to improve the controlling device for operating this clamping mechanism. o With these and Votheriobjects in view, my invention consists in the features of construcf tion and operation set forth in the following specification and `illustrated in the accom-y panying drawings. i 3

f ln the drawings annexed hereto and forming apart of this kspecification, lv` have shown my invention embodied in 3a tire turning machine adapted particularlyfor surfacing the tread of locomotive wheel tires but it will he understood that 'the invention can P be otherwise embodied and that the drawings are not to be construed as` defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.V

ln the. drawings: ,i

Figure l is a plan view of the complete machine. i

Fig. 2 is a front elevation ofthe machine, parts being broken away `to more clearly show the work centering and clamping mechanisms. y

Fig. 3 is a side elevation, parts being shown. in section to more clearly disclose their construction.

Fig. t isa fragmentary front elevation with the `clamping means in their inoperae tive position.

Fig. 5 is aplan view of one side ofthe machine showing the tool carriage and slides. Y

Fig. 6 is a sectional viewtaken on line e-e of Fig. e. 1 t

In the above mentioned drawings, I have shown but one embodiment of the invention whichis now deemed preferable butit `is to heunderstood that `changes and Vmodifica-` tions` may be made withinthe scope of the appended claims without departingl from the spirit of the invention. y y,

Briefly, and yin its broadest aspect," myin-` vention consists in the following principal parts: first, a base; second, a work table,

rotatably mounted thereon preferably mounted on an elongated hollow spindle; third, carriages or slides having adjustable tools thereon and adapted to engage `and cut work mountedon the table;` fourth, centeri ing jaws on the 'w'orlr table adapted to 4con- Vtact'with a surface ofthe work and adapted to ybe moved vradiallyV toward or from the axis of rotation yof the work table; fifth,

clamping jaws for rigidlyholding the Work blanlr` in position on theworl; table; sixth, adjustable means to move t-he clampingjaws into and out of operative position relative tothe work, blank; and seventh, pneumati cally actuated means for Vforcing thejaws into yclamping `engagement with the blankv being operatedon. r i

Referring more in detail to the figures of thedrawings, .l provide a base 10 preferably comprising a. housing having bearlngs `1l vertically disposed in its forward part. Nithinthese bearings 11 is adapted to be rotated a spindle 12 provided at its upper end witha work table 13 which may be suitp. y

ably` `fastened thereto ,by` any preferred means. rlhe worlrtable 13 .during rotation bears upon an annular ,planesurface'lf pre-i and disposed within the base` 10. These shafts 18 at their forward ends are provided with bevel kgears 19 in mesh with corresponding bevel gears 20 on the lower ends of vertically dlsposed pinion shafts' 21. Each of these vertically disposed shafts 21 atfitsfupper endisfprovided with a pinion 22 in mesh with a spur gear 23 bolted to the` lower face of the work table 13 and rotating therewith. From this description, it will be seen that the table `l?) may be rotated at different relatively low speeds, thek two inions 22 serving to make the rotation uuiorm', powerful, and without lost motion.

Disposed horizontally and on either side of the upper portions of the housing 10 are tool, carriages 25 having at theirv inner or adjacent ends tool heads 26 upon which cutting tools 27 may be mounted. These carriages 25 are adapted to slide upon planed ways on the'housing or base 10. As shown in Fig. 3,'ways 28are provided on the housing 10 so disposed that the carriage 25 is supported upon surfaces at right angles to each other so that its support will be sutiithe carriage 25.

shown vm the present embodiment of the inciently rigid.V Retaining strips 29 adjacent both of the ways are provided which are adapted to engage over suitable portions of The particular tools 2,7

vention comprise formed tools adapted to completely finish the tread contour on the outside surface of a locomotive tire. These v tools27 comprise flat plate-like pieces of metal, one surface being shaped to correspond exactly with the contour desired to be cut. As show-ny most clearly in Fig.` 2, these cutters orf tools '27 are securely clamped in position byhmeans of 'clamping levers 30 adapted to pivot about the axis of the bolt 31 and be oscillated to firmly clamp the eut i ter by means of an adjustable screw 32 at the outer end ofthe levers 30. The mountings f., forthe tools 27 `on the twocarriages 25 are materially different and are' designed to retain the tools 27 in position so that they may simultaneously engage and cut the blank A.' That is, they are so mounted that they will properly engage the blank A while it is bei' ing rotated in onedirection.

First, the tool head 26 on the carriage 25 at the left will be described. As the forming tool 27 may re- Vquire vertical adjustment, the carriage 25 is provided with vertically disposed ways on which 'the tool head 26 is mounted. The tool 27- and its clamping means 30 above described are carried upon this tool head 26. Bymeans of a suitable screw 33, the vertical position of the tool head 26 may be varied toY position its tool 27 properly relative to the blank A; being operated on. As the work to whichthese tools 27 may be subjected is very heavy, the tool head 26, if desired, may be clamped during operation directly to the tool carriage 25' by means of the clamping screws 34 as shown. In order to advance the nected with a shaft 38 rotatably carrying a hand wheel 87. Rotation therefore of the hand wheel 37 serves to position the tool carriage 25 and hold it in contact with the work A. Also. if desired, power means may be provided to feed the carriage 25 forwardly during operation. For this purpose, a feed shaft 38 is provided horizontally mounted within the housing 10 and at its forward end extending through the axis of the hand wheel 37. This feed shaft is provided with a clutch 39 splinedthereto and adapted to bc brought into engagement with a corresponding clutch part on the hand wheel 37. For this purpose a small hand wheel 40 is provided. It will be seen that by rotating the small hand wheel 40 the teeth of the clutch members 39 will be engaged so that the kfeed shaft 38 will positively rotatel the driving connections and advance the carriage 25 horizontally along its ways.

Preferably, and as shown in Fig. 2, the right hand tool carriage 25 may have a special tool 41 mounted thereon for performing a facing operation upon the upper face of the tire or blank A. This may be used after the tire has been completely surfaced upon its outer periphery and after the clamping jaws have been removed and others, adapted to engage the internal surface, substituted therefor. To carry this tool 41, a supplemental tool slide 42 is mounted as shown in Fig. 2 upon the forward and upper portions of the tool head 26 mounted on the tool carriage 25 so that thisl facing tool 41 may be moved horizontally and vertically upon the carriage 25 and its tool head 26 as well as horizontally by movement'of the slide 42. A finishing tool 43 for the tire tread A is provided on tool head 26 which may be clamped in position upon the slide in the same manner as the one previously described on the left hand carriage 25. Adjusting means for this cross slide 42 are also' proivided similar to those above described. U pon the slide 42 on this carriage 25 is a supplementary vertically movable slide 45. lt is upon this supplemental vertically movingr slide that is carried the cutter 4l of plate form adapted to surface the upper face of the tire. In addition a small tool 4G may be carried at the lower end of a swinging arm 47 for cutting the witness groove with which tires are usually provided tofindicate the maximum allowable wear. T o raise and lower the supplemental cross slide 45, a hand wheel 48 operates through bevel gears to rotate a screw rotatably mounted thereon. The supplemental horizontal slide 42 on the tool head 26 maybe adjusted by a screw rotated by a hand Wheel 49. It will be understood that when the tread of the tire is being turned, the cross slide 42 4will be Withdrawn to inoperative position so that its tools L11. and 46 will not interfere `With the cutting operation. y

In order to properly center the work- A upon the table 13, three Work engaging` and supporting members 50 are provided adjustably clamped upon radially disposed arms 51 provided VWithin the upper surface ofthe Work table 13. These engaging members 50 are, as shovvmclamped directly to these radially disposed arms 51 in* a manner so that they may be adjusted radially for any predetermined size of Work A being operated upon. In order to simultaneously actuate these members 50 radially to 'center the Work, a cam plate 52 is provided centrally disposed relative to the Work table 13. `his plate 52 is provided With three spiralk grooves 53 each of Which is adapted to be engaged by a projection 54 on the inner end of the radial arms 51. Angular movement, therefore, of this cam `plate 52 relative lto the Work table v13- serves to more the radial arms 51 toward or from the axis ot rotation of the table 13. Thus, by an outward movement of the arms 51, the 'supporting members 50 are brought into contact with the bore of the tire on blank and is centered correctly therefrom. Angular movement of the cam plate 52 in the opposite direction relative to the Work table 13 will move the supporting members 50 inward and thus release them and permit "removal of the blank A. l

In order to effect rotativemovemcnt of the cam plate 52 relative to the Work spindle 12 and table 13, a member in the form of a sleeve 55 is inserted Within the hollow spindle 12 which is provided with a projection 56 extending radially outward from the sleeve 55 through an arcuate slot formed in one side of the spindle 12.' This projection 56 on the sleeve .551 engages a key-Wayor spline in a gear 57 rotatably mounted upon the outer periphery of the spindle 12 and suitably retained in position by airing 5S threaded or otherwise fastenedy to the spindle l2. In order to rotate this gear 57 to effect the movement of the cam plate 52 and radial arms 51 for the centering operation,`

the gear 57 is adapted tobeengaged by a pinion 59 mounted rotatably upon avertically disposed shaft 60. Thisvshaft 60 is rotated by another gear 61 fast on the shaft 60 through a compound reducing gear ,62 in mesh with a gear 63 upon a sleeve 6-1 on shaft 60. This sleeve 64 is provided with a clutch member 65 adaptedto be moved into or out of contact with a rotatable clutch member `66 adjacent thereto. These `clutch members 65 and `66 are, clearly shown in preferably keyed directly to the vertically disposed lshaft 60 extending through the sleeve and adapted to` be operated in either direction by rotation of a small electric motor 67 drivingly connected thereto through any appropriate gearing. It will be seen therefore that rotation of the motor -67 in one 'direction and with the clutch members 65 and 6G in operative position the gear 57 may be f rotated relative to the spindle 12 and table 13 and thus the cam plate 52 may be rotatedvrelative thereto in a directionto move the radially disposed arms 51 outwardly. A Work blanlrA mounted on the table 13 upon the outsides of these membersr() when in their inner positions will beacourately 'centered by this simultaneous outward-radial movement of the three centering members 51.` The outward movement of the members 50 is not sufficient to distort the .Fig.` 3, the rotating member 66 of which is i ses' tire as these members() are not relied upon tohold the blank in position during operation. Rotation of the table 13 by the means above described during the cutting operation When the clutch 65-66is out of operative position tends to hold the members 50 in their outer position due to the drag upon A. being operated upon. The pedestals 71 j may be adjustably mounted on y the `Work table 13 and held in position' by means of bolts 72fentering T-slots provided `in the table. Pivotallymounted on these pedestals 71 are links 73 which in turn pivotally engage an intermediate point of the jaws 70.

The outer ends of the jaws or levers 70` comprise `the Work contacting portions and the inner extended 'arms form their actuating ends. By means of a central bar 7 5 extending vertically through the Work spindle 12 and `adapted to be raised or lowered,` the inner ends 4ofthe jaws 7() are adapted to be actuated. Asshown the bar 75 is slidable Within holes provided Within the sleeve55. Preferably, the three j aivsTO engage at their inner ends an equalizing plate 76 which is in enga-gement with the upper end ofthe vertically movable bar 75.' yIt will be seen therefore that with the bar 75 in its lowermost position, the jaws 70 Will be positioned so that` -rvork Amay be readily positioned and centered uponitheivork table 13 (see yclutch 66 heretofore described.

Fig'. Elevating the central vertically movable bar 75 will first oscillate the links 73 to the osition shown in Fig. 2 and then oscillate he jaws .70 to engage the work blank A.

In order to raise andlower this central bar 75 to actuate the clamping `iaws 70, mechanical means are provided which preferably are used for quicklymoving the jaws 70 to their operative and inoperative position. In addition to these mechanical means, pneumatic means are provided to effect ka final powerful clamping pressure of the jaws 7 0 against the work blank A. v The ymechanical means comprise a cross piece 77 bearing against the lower end of the bar75 and restingat its opposite ends upon the short arms of levers 78 supported by a ring member 79 surrounding the work spindle 12. As shown in Fig. 2, the cross piece extends thorugh Ylongitudinal slots cut into the spindle 12 on opposite sides. Below the ring member 79 is provided a second ring member 80 with screw threads upon its outer surface adapted to engage corresponding screw threads formed directly upon the spindle 12. Rotation, therefore, of this ring 80 will raise .or lower it and thus raise or lower the first ring 79 and the central bar 7 5. To eect this rotative movement ofthe ring 8O relative to the spindle l2 and the ring 79, a gear 81 is fastened directly to ring 80 which is adapted to be engaged by an elongated pinion 83 rotatable upon shaft 60. This pinion 83 is provided at its upper end with a' clutch member 84 adapted `to contact with a corresponding clutch member preferably oppositely disposed to and forming a part of It will therefore be seen that movement of this clutch 84.- to operative position and by rotating the motor 67 in the desired direction, the ring member 8O may be traversed up or down upon Vthe spindle to raise or lower the central bar 75 and thus move the clamping jaws into and out of operative position.

To finally clamp the jaws 70 rigidly against the work blanlrA with an extremely high pressure, pneumatic means are mounted on the spindle 12 and are, as shown, preferably associated with the ring member 79 and the supporting cross piece 77 for the bar 75. This pneumatic means is most clearly shown in Figs. 2 and 4 and comprises a cylinder 85, the piston 86 of which yis attached to the supporting cross piece 77 for the bar through a'link 87 which serves as a piston rod. The cylinder 85 enclosing the piston 86'is movable up or down relative to this piston 86 and rod 87 and, upn its uplper surface, forms a bearing for the inner ends of the levers 78 engaging the supportmg ring 79.. These levers 78 are fulcrumed upon the ring 79 surrounding the spindle l2 so that oscillation of the. levers 78 will force the ring 79 and cross piece 77 slightly toward or from each other. It will be seen that by admitting -air or other fluid to a position wit-hin the cylinder 85 and above the piston 86 that the cylinder 85 will be clevated thus oscillating the levers 78 and 'forcing upward the cross piece 77 and bar 75 so that the jaws 70 will be rigidly forced into their clamping position. To unelamp the jaws 70,' it is only necessary to release the air from above the piston 8G and to admit air to a point below the piston 86 which serves to lower the cylinder 85 and thus move the levers 78 to their opposite or inoperative position to release'thc member 77 and lower it relative to bearing surfaces on the ring 79 and permit slight lowering of the central `bar 75. As shown .in Fig. 2, the cylinder 85 is provided with stuiling boxes 90 at its upper and lower 'ends through which pass the piston rod 87 and a lower extension thereto. The piston rod 87 extension is bored and at its lower end is provided with a swivel connection. Through this connection air under pressure may be admitted and the cylinder 85 and parts associated thereto permitted to rotate with the spindle 12. At a point above the piston 86 the pis.- ton rod-87 is drilled to intercept the central bore. To admit air to the cylinder 85 at a point below the piston 86, a connection 91 may be inserted in its lower face.

lVhat I claim is:

1. A machine tool comprising in combination, a base, a work supporting and rotating spindle having a table thereon, work clamping means On said table, power actuat ed means to advance said clamping means into and out of operative postion relative. to the work, and independently acting means to move said clamping means to their final clamping position upon the work, said advancing means being mounted on and axially movable on the spindle.

2. A machine tool comprising in combination, a base, a work supporting table thereon, a plurality of work clamping means on said table, power actuated means to advance said clamping means into operative position relative to the work, and pneumatic means to simultaneously move said clamping means to their final clamping position upon the work.

8. A machine tool comprising in combination, a base, a work supporting and rotating table thereon, work clamping means on said table, actuating means therefor centrally disposed below said table, screw threaded means to advance the actuating means to operative position, and pneumatic means associated with said actuating means to move said clamping means to their final clamping position upon the work.

4. Ar machine tool comprising in combina tion, a base, a work supporting and rotating spindle having a table thereon, work clamping means on said table, actuating means therefor centrally disposed upon said spindle below said table, screw threaded means engaging the spindle to advance the actuating simultaneously advance the actuating means to operative position, and pneumatic means carried by and moving with said actuating means to simultaneously movesaid clamping means to their final clamping position upon the work.

6. A machine tool comprising in combination, a base, a work supporting and rotating spindle having' a table thereon, a plurality of work clamping jaws on said table, actuating means therefor comprising a vertically movable rod, adjustable supporting means 'ior the rod disposed below said table, screw threaded mea-ns to raise and lower the rod to move the actuating jaws into and out of operative position, and pneumatic means associated with said actuating means to move saidclamping jaws to their final clamping position upon the work.

7. A machine tool comprising in combination, a base, a work supporting table thereon, work clamping means on said table, work centering means thereon, cam actuated means for operating the centering means, means to move the clamping means into and out of operative position, and pneumatic means to eifect the clamping movement of said means.

8. A machine tool comprising in combination, a base, a work supporting table thereon, a plurality of work clamping jaws on said table, work centering means thereon, cam actuated means for operating the centering means, actnating means for said clamping jaws, means to move the actuating means into and out of operative position, Iand pneumatic means to effect the clamping movement of said means.

9. A machine tool comprising in combination, a base, a work supporting table thereon, work clamping jaws on said table, work centering means thereon, cam actuated means for operating the centering means, a vertically movable rod to advance the clamping means into `and out of operative position,

screw threaded means to move said rod to control the movementof the jaws, andindependently controlled' pneumatic means to effect theclamping movement ofV said jaws Y f l0. A' machine tool comprising in combination, a base, a work supporting table thereon, work clamping means -on said table, clam-ping jaws pivotally mounted on the table, common centrally disposed means for oscillating' said jaws, said means extending v below ythe table and provided with screw threaded means to simultaneously oscillate the jaws, and means to rotate the screw threaded means to movethe jaws to their operative and inoperative positions.

l1. A machine tool comprising incombination, a base, a work supporting` table thereon, work clamping means on said table,

.work centering means thereon, a centrally disposed cam for actuating the centering' means, clamping jaws pivotally mounted ony the table, common centrally disposed means `for oscillating said jaws, said means extending below the table and provided with screw threaded means to simultaneously oscillate the jaws, and means to rotate the screw threaded means to move the jaws to their operative and inoperative positions.

l2. A machine tool comprising in `cornbination, a base, a work supporting table.

thereon, work clamping means on said table, clamping jaws pivotally mounted on the table, common centrally disposed means Jfor oscillating said jaws, said means extending below the table and provided with screw threaded means to simultaneously oscillate the jaws, means to rotate the screw threaded means to move the jaws to their operative and inoperative positions, and supplementary means to eiiect the iinal clamping movement of the jaws. f

13. A machine tool comprisingin combination, a base, a work supporting Vtable thereon, work clamping means on said table, 4

work centering means thereon, a centrally disposed cam for actuating the centering means, clamping jaws pivotally mounted on the table, common centrally disposed means for oscillating said jaws, said means extend- .ing below the table and provided with screw threaded means to simultaneouslyv oscillate the jaws, means to rotate the screw threaded means to move the jaws to their operative and inoperative positions, and pneumatic means carried by and moving with the screw threaded means for eiieoting the final clamping movement of the jaws.

In testimony whereof, I hereto aliX my signature.

LYNDON C. COLEf 

